A dense aluminum carbon dioxide battery cell, battery pack and applications thereof

Abstract

The present application belongs to the technical field of electrochemical cell, and particularly relates to a dense aluminum carbon dioxide cell unit, a battery pack and application thereof. The dense aluminum carbon dioxide cell unit used in the present application has multiple micro-cells arranged uniformly in a unit area, multiple gas passages and gaskets on the unit, which can increase the contact reaction area with the automobile exhaust CO2 to the maximum while reducing the weight of the battery. The present application also assembles multiple dense aluminum carbon dioxide cell units together, and the cell units work automatically without additional heating by using the residual heat of the automobile exhaust. The generated electric energy can also charge the automobile storage battery, which has the advantages of energy saving and emission reduction. The battery electrolyte and aluminum oxalate generated during the work of the battery are recycled to prepare high value-added product oxalic acid, which greatly reduces the cost and achieves high economic benefits.

Description

Technical Field

[0001] This invention belongs to the field of electrochemical battery technology, specifically relating to a dense aluminum carbon dioxide battery cell, a battery pack including the battery cell, and their applications. Background Technology

[0002] There are currently about 1.446 billion gasoline-powered vehicles in the world, emitting about 720 million tons of CO2 into the atmosphere annually, accounting for 7.5% of total social emissions. The carbon dioxide emissions from these vehicles are characterized by wide distribution and low concentration, making them difficult to absorb and utilize using traditional CCUS (Carbon Dioxide, Fuel, and Gas) technology. Existing solutions focus on reducing carbon content at the fuel source, such as using zero-carbon fuels like hydrogen or replacing gasoline-powered vehicles with hybrid or pure electric vehicles. However, due to battery technology bottlenecks in electric vehicles and the limited availability of hydrogen fuel cell vehicles, gasoline-powered vehicles still dominate the market. It is clear that gasoline-powered vehicles will not disappear from the market in the short term and will remain irreplaceable in certain sectors.

[0003] Currently, the treatment of mobile end-of-pipe low-concentration carbon dioxide sources usually involves placing a catalyst at the end of the exhaust pipe to catalyze carbon dioxide into other gases (such as CO). However, the small contact area between the catalyst and carbon dioxide leads to low catalytic efficiency and the total carbon emissions are not reduced much in the end.

[0004] Metal carbon dioxide batteries use carbon dioxide as a reactant in battery applications, and their carbon dioxide fixation effect is relatively good. However, there are still problems such as low battery voltage and the need for heating devices to control the initial reaction temperature. There are currently no reports in the literature on their application in carbon fixation in automobile exhaust. Summary of the Invention

[0005] To address the aforementioned technical problems, this invention provides a dense micro-battery type aluminum carbon dioxide battery cell and battery pack. The battery cell can maximize the contact area with carbon dioxide, thereby improving the battery reaction efficiency. The battery pack is composed of multiple such battery cells. The battery pack can enter the working state using the temperature of the exhaust gas waste heat without additional heating. Furthermore, it can continuously supply energy to the engine battery while fixing carbon dioxide through the reaction of the metal gas battery.

[0006] According to one embodiment of the present invention, the present invention first provides a dense aluminum carbon dioxide battery cell, the battery cell comprising a housing (8) in an axial cross section, an anode aluminum plate (7) having an outer surface of the axial cross section of the housing, a plurality of gas flow pipe openings (9) uniformly arranged on the surface of the anode aluminum plate (7) for introducing carbon dioxide through a gasket (5), an air cathode (6) being fixed between the anode aluminum plate (7) and the gas flow pipe openings (9), the air cathode (6) being impregnated with an electrolyte; thus, the carbon dioxide in contact with the gas flow pipe openings (9), the air cathode (6), and the anode aluminum plate (7) together form a micro battery.

[0007] According to one embodiment of the present invention, the openings of the plurality of gas flow channels are honeycomb-shaped.

[0008] According to one embodiment of the present invention, the front end surface and the rear end surface of the housing have protruding front end cap (1) and rear end cap (2), respectively. The shape of the housing can be one of circle, rectangle, ellipse, and waist shape. The front end cap (1) and the rear end cap (2) have uniformly arranged mounting and fixing holes.

[0009] According to one embodiment of the present invention, the washer (5) is made of a high-temperature electrical insulating material, preferably PEEK.

[0010] According to one embodiment of the present invention, the outer shell (8) is made of engineering plastic, fiber composite material or stainless steel with an insulating layer on the inner surface; the outer shell (8) is provided with an electrolyte circulation pipe hole (4).

[0011] According to one embodiment of the present invention, the electrolyte is an ionic liquid, preferably 1-ethyl-3-methylimidazolium chloride / aluminum chloride.

[0012] According to one embodiment of the present invention, the air cathode (6) is a porous air cathode composed of porous graphite and polytetrafluoroethylene film, which ensures waterproof and breathable properties while also having catalytic benefits and good conductivity. At the same time, the corrosion resistance and high temperature resistance of polytetrafluoroethylene and graphite also ensure that the battery can operate in a variety of environments.

[0013] Preferably, the length of the dense aluminum carbon dioxide battery cell is 5-20 cm.

[0014] According to another aspect of the present invention, the present invention also provides a battery pack comprising the above-described battery cells, wherein the metal carbon dioxide battery pack comprises n dense aluminum carbon dioxide battery cells connected in series or in parallel, wherein n is a positive integer greater than or equal to 5.

[0015] According to another aspect of the present invention, the present invention also provides the application of the above-described dense aluminum carbon dioxide battery cell or battery cell pack in carbon sequestration of automobile exhaust.

[0016] In summary, compared with the prior art, the above-described technical solutions conceived by this invention mainly possess the following technical advantages: 1) The dense aluminum carbon dioxide battery cell used in this invention has multiple uniformly arranged microcells per unit area, with multiple gas channels and gaskets, which can reduce the weight of the battery while maximizing the contact and reaction with automobile exhaust gas. 2) The dense aluminum carbon dioxide battery unit used in this invention has a simple structure, is easy to replace, and is convenient to carry. It works automatically using the residual heat of automobile exhaust without the need for additional heating. The electrical energy generated during its operation can also charge the battery, combining the dual advantages of energy saving and emission reduction. 3) This invention significantly reduces costs and achieves extremely high economic benefits by recovering battery electrolytes and aluminum oxalate, a high-value-added product generated during battery operation.

[0017] 4) The dense aluminum carbon dioxide battery cell and battery pack of the present invention are very easy to assemble and disassemble. Their lifespan is designed to be replaced every 6 months, which can be synchronized with the car maintenance cycle, making them very easy to promote. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of multiple microcell structures of the dense aluminum carbon dioxide battery cell of the present invention.

[0019] Figure 2 This is a schematic diagram of the structure of the dense aluminum carbon dioxide battery cell pack of the present invention.

[0020] Figure 3 This is a schematic diagram of the assembly of the dense aluminum carbon dioxide battery cell pack of the present invention in a car exhaust pipe.

[0021] Figure 4 This is a schematic diagram illustrating the application principle of the dense aluminum carbon dioxide battery pack of the present invention in carbon sequestration in automobile exhaust.

[0022] Figure 5 This is a process flow diagram of the product recycling process for the carbon fixation application of this invention.

[0023] Reference numerals: 1. Front end cap 2. Rear end cap 3. Copper electrode plate 4. Electrolyte circulation pipe hole 5. Gasket 6. Air cathode 7. Anode aluminum plate 8. Housing 9. Gas flow pipe opening 10. Circular interface 11. Air premixing chamber 12. Battery module. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of this invention clearer and to facilitate a better understanding of the technical solutions of this invention by those skilled in the art, the invention will be further described in detail below with reference to the accompanying drawings.

[0025] Example 1 like Figure 1 As shown, this invention first provides a dense aluminum carbon dioxide battery unit. The battery unit includes a shell in its axial cross-section. An anode aluminum plate is provided on the outer surface of the shell's axial cross-section. Multiple axially penetrating gas flow channel openings are uniformly arranged in the anode aluminum plate. Gaskets and an air cathode are also provided between the gas flow channel openings and the anode aluminum plate. Carbon dioxide in contact with the multiple gas flow channel openings, together with the air cathode and the anode aluminum plate, forms multiple uniformly arranged microcells. The number of microcells is controlled between 50 and 120. The gas flow channel openings are hexagonal in shape, and the multiple gas flow channels are honeycomb-shaped. The shell is waist-shaped. The front and rear pressure caps have uniformly arranged mounting and fixing holes. The gasket material is PEEK. The electrolyte is 1-ethyl-3-methylimidazolium chloride / aluminum chloride ionic liquid. The air cathode is composed of porous graphite and polytetrafluoroethylene film, which ensures waterproof and breathable properties while also having catalytic benefits and good conductivity. At the same time, the corrosion resistance and high temperature resistance of polytetrafluoroethylene and graphite ensure that this dense aluminum carbon dioxide battery unit can operate in various environments. The ionic liquid enters the electrolyte circulation pipe (not shown) inside the shell through the electrolyte circulation pipe hole on the shell, and then permeates into the porous air cathode by gravity and reacts with carbon dioxide at the electrode.

[0026] Example 2 In this example, a dense aluminum-carbon dioxide battery cell with an axial length of 5 cm was selected, totaling 10 cells with a total weight of 20 kg. The battery casing is made of fiber composite material. The rear end face of one cell and the front end face of the next cell in each dense aluminum-carbon dioxide battery cell are connected by washers and screws, with a conductive copper electrode plate sandwiched in between. The positive terminal of each cell is connected to the front copper electrode plate, and the negative terminal is connected to the rear copper electrode plate. The copper electrode plate has a wire (not shown) for supplying power to the outside environment. Figure 2 As shown. Then, circular interfaces are welded to the outer surfaces of the battery cells at both ends of the battery pack module. One end is used to connect to the air premixing chamber, and the other end is used to connect to the vehicle's exhaust pipe. The air premixing chamber is used to draw air into the battery pack module to increase the oxygen, i.e., the co-catalyst concentration, such as... Figure 3 and Figure 4 As shown. Then, one section of the vehicle's exhaust pipe, which consists of multiple exhaust pipes, is removed, and the air premixing chamber and battery pack module are installed in the vehicle's exhaust pipe.

[0027] Application testing The battery pack was installed in the exhaust pipe of a small car. After 6 months, the battery pack module was removed from the exhaust pipe, and the weight gain was calculated.

[0028] like Figure 5 As shown, the electrolyte circulation pipe opening (not shown) at the lower end of the shell is then opened, the electrolyte in the electrolyte channel is taken out, and the electrolyte and aluminum oxalate powder are obtained by electrolysis. The electrolyte is recycled, and the aluminum oxalate powder is dissolved in sulfuric acid to obtain a mixed solution. The mixed solution is extracted and separated with ethanol to obtain an oxalic acid-ethanol organic phase and an aqueous phase. The oxalic acid-ethanol organic phase is evaporated to obtain high-value-added oxalic acid powder with a mass of 97.8 kg.

[0029] Example 3 In this example, a compact aluminum-carbon dioxide battery cell with an axial length of 20cm is selected, totaling 5 cells with a total weight of 100KG. The battery casing is made of stainless steel with an insulating layer on the inner surface. The rear end face of the preceding cell and the front end face of the following cell in each compact aluminum-carbon dioxide battery cell are connected using washers and screws. The positive terminal of each cell is connected to the copper plate on the front end face, and the negative terminal is connected to the copper plate on the rear end face. The copper plates have wires (not shown) for supplying power to the outside environment. Figure 2 As shown. Then, circular interfaces are welded to the outer surfaces of the battery cells at both ends of the battery pack module. One end is used to connect to the air premixing chamber, and the other end is used to connect to the vehicle's exhaust pipe. The air premixing chamber is used to draw air into the battery pack module to increase the oxygen, i.e., the co-catalyst concentration, such as... Figure 3 and Figure 4 As shown. Then, one section of the vehicle's exhaust pipe, which consists of multiple exhaust pipes, is removed, and the air premixing chamber and the battery pack module are installed in the vehicle's exhaust pipe.

[0030] Application testing The battery pack was installed in the exhaust pipe of a large truck. After 6 months, the battery pack module was removed from the exhaust pipe, and the weight gain was calculated.

[0031] Then open the electrolyte circulation pipe opening at the lower end of the shell (not shown) and remove the electrolyte from the electrolyte channel, such as... Figure 5 The electrolyte is electrolyzed to separate the electrolyte and aluminum oxalate powder. The electrolyte is recycled. The aluminum oxalate powder is then dissolved in sulfuric acid to obtain a mixed solution. The mixed solution is extracted and separated with ethanol to obtain an oxalic acid-ethanol organic phase and an aqueous phase. The oxalic acid-ethanol organic phase is evaporated to obtain high-value-added oxalic acid powder with a mass of 488.9 kg.

[0032] Those skilled in the art will readily understand that the above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A dense aluminum carbon dioxide battery cell, characterized in that, The battery cell includes a housing (8) in its axial cross-section. The outer surface of the housing in its axial cross-section has an anode aluminum plate (7). The surface of the anode aluminum plate (7) has a plurality of axially penetrating gas flow pipe openings (9) for introducing carbon dioxide. An air cathode (6) is fixed between the anode aluminum plate (7) and the gas flow pipe openings (9) by a gasket (5). The air cathode (6) is impregnated with an electrolyte. Thus, the carbon dioxide in contact with the gas flow pipe openings (9), the air cathode (6), and the anode aluminum plate (7) together form a micro battery. The gas flow pipe opening (9) is hexagonal in shape, and the multiple gas flow pipe openings (9) are honeycomb-shaped; the air cathode (6) is a porous air cathode, which is composed of porous graphite and polytetrafluoroethylene film.

2. The dense aluminum carbon dioxide battery cell according to claim 1, characterized in that, The front and rear surfaces of the housing have protruding front cover (1) and rear cover (2) respectively. The shape of the housing is one of circle, rectangle, ellipse and waist shape. The front cover (1) and the rear cover (2) have uniformly arranged mounting holes.

3. The dense aluminum carbon dioxide battery cell according to claim 1, characterized in that, The washer (5) is made of high-temperature electrical insulation material.

4. A dense aluminum carbon dioxide battery cell according to claim 3, characterized in that, The washer (5) is made of PEEK material.

5. A dense aluminum carbon dioxide battery cell according to claim 1, characterized in that, The electrolyte is an ionic liquid.

6. A dense aluminum carbon dioxide battery cell according to claim 5, characterized in that, The ionic liquid is 1-ethyl-3-methylimidazolium chloride / aluminum chloride.

7. A dense aluminum carbon dioxide battery cell according to claim 5, characterized in that, The outer shell (8) is made of engineering plastic, fiber composite material or stainless steel with an insulating layer on the inner surface; the outer shell (8) is provided with an electrolyte circulation pipe hole (4).

8. A dense aluminum carbon dioxide battery cell according to any one of claims 1-7, characterized in that, The length of the dense aluminum carbon dioxide battery cell is 5-20cm.

9. A battery pack comprising a dense aluminum carbon dioxide battery cell as described in any one of claims 1-8, characterized in that, The battery pack comprises n dense aluminum carbon dioxide battery cells connected in series or in parallel, where n is a positive integer greater than or equal to 5.

10. The application of a dense aluminum carbon dioxide battery cell as described in any one of claims 1-8 or a battery pack of a dense aluminum carbon dioxide battery cell as described in claim 9 in carbon sequestration in automobile exhaust.

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